Water-meter piston.



J. G. KELLEY.

WATER METER PISTON.

APPLICATION FILED we. 22. 190B.

Patented Mar.1,1910.

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JOHN C. KELLEY, OF NEW YORK, N. Y., ASSIGNOR TO NATIONAL METER COMPANY,OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

WATER-METER PISTON.

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Specification of Letters Patent.

Patented Mar. 1, 1910.

Application filed August 22, 1908. Serial No. 449,792.

To all whom it may concern:

Be it known that I, JOHN C. KELLEY, a citizen of the United States, anda resident of New York city, borough of Brooklyn, in the county of Kingsand State of New York, have invented a new and useful Improvcz ment inater-Meter Pistons, of which the following is a specification.

My invention relates to water meters and more particularly to theconstruction of the piston as hereinafter described. It will beunderstood by reference to the accompanying drawings, in which- Figure 1is a top view of the piston showing the strengthening plate in outline;Fig. 2 is a central vertical section on the plane of the line 2-2 ofFig. 1; Fig. 3 is a top or face view of the strengthening plate; andFig. 1 is a central vertical section through the plane of the line 4l4of Fig. 3.

Similar reference numerals indicate similar )arts in the several views.

The piston 1 is in the form of a disk or cone having a central sphericalbearing hub 2 which fits in the corresponding recess of the case andmakes a joint with the spherical surface thereof, while the sides of thepiston will be in contact with the conical ends of the chamber. Thepiston has a radial slot 3 formed so as to fit freely over an abutment,as is well understood, to permit the water to flow from one side of thepiston to the other in its operation. The hub 2 has a central bore 4 toreceive the spindle of the reg istering mechanism.

To increase the sensitiveness in the movement of the piston it ispreferably formed of hard rubber, which has nearly the same speeifiegravity as water, and, to reduce to a minimum the liability ofdistortion, is formed with a strengthening plate t in the followingmanner: Between halves of the piston, made of soft rubber, is laid aplate 5 of sheet metal, preferably steel, which may be shaped in asuitable die. The whole is then pressed and vulcanized.

The form of plate preferred by me is conical to conform to the shape ofthe piston and is strengthened by ribs or corrugations in any convenientmanner. In the manner shown the plate has a series of radial ribs 6extending from about the center to the periphery, the latter beingturned over to form a bead 7. In addition to the bead or corrugation 7the plate may be formed with one or more intermediate corrugations 8concentric with the central opening and intersecting the radialcorrugations, said corrugations 8 being preferably arranged adjacent thepoint at which the body of the disk connects with the ball or hub 2.These corrugations increase the strength of the plate without increasingits weight.

The plate 5 is provided with a central opening 8 of greater diameterthan the bore 4, and is of less radial extent than the disk of thepiston, so as to be completely em bedded in the piston. To permit of aproper union between the halves of the piston in the process of itsmanufacture, the plate 5 is provided with a series of perforations oropenings 9 which may be conveniently located between the ribs orcorrugations (5, as clearly shown in the drawings.

I do not wish to be limited to the character or number of corrugationsshown in the drawings. Obviously they may be varied in character withoutdeparting from the spirit of my invention.

lVhat I claim and desire to secure by Letters Patent is 1. A water meterpiston, comprising a rubber disk and a metallic stiffening plateembedded in the body of the disk and having a central opening, saidplate being formed with a peripheral stiffening bead, and a concentricbead adjacent the opening, beads connecting the inner and outer beadsand dividing the body of the plate into a plurality of sections, each ofsaid sections being perforated to permit the union of the rubbercomposing the two sides of the disk.

2. A water meter piston, comprising a rubber disk and hub, and ametallic stiffenin plate embedded in the body of the disk, and

having a central opening, said plate being.

juncture of the disk with the hub, radially disposed beads connectingthe inner and outer beads, and dividing the body of the plate into aplurality of segmental portions,

each of said segmental portions being perforated to permit the union ofthe rubber of the opposing two sides of the disk.

